/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.internal.network;

import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/** {@link ChannelType} registrar. */
public class ChannelTypeRegistrar {
    private final Map<Short, ChannelType> channelTypeById = new ConcurrentHashMap<>();

    /**
     * Registers a channel type by {@link ChannelType#id()}, expecting that a channel with that ID has not yet been registered.
     *
     * @param channelType Channel type for registration.
     */
    public void register(ChannelType channelType) {
        ChannelType previous = channelTypeById.putIfAbsent(channelType.id(), channelType);

        assert previous == null : "new=" + channelType + ", old=" + previous;
    }

    /** Returns all registered {@link ChannelType} unique by {@link ChannelType#id()}. */
    public Collection<ChannelType> getAll() {
        return List.copyOf(channelTypeById.values());
    }
}
